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Cylinders & Pistons

160 products

Shop the range of aftermarket motorcycle engine products at Pro Class Custom Parts.

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Regular price $1,244.99
Sale price $1,244.99
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Features & Benefits:- * ID # 4874 * Bore = 4.134″ * Stroke = 2.835″ * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * Forged from high strength 2618 alloy * Designed f...
Regular price $842.99
Sale price $842.99
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Features & Benefits:- * ID # 2456 * Bore = 3.937″ * Stroke = 2.835″ * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * Forged from high strength 2618 alloy * Designed f...
Regular price $1,221.99
Sale price $1,221.99
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Features & Benefits:- These high compression pistons feature a 7cc raised dome to achieve a compression ratio of 11:1 (from 9.5:1). Higher compression is a key factor in increasing performance...
Regular price $707.99
Sale price $707.99
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Features & Benefits:- * Super Duty KB Forged Coated Anodized Piston Kit. * 107ci to Big bore 124″ piston kit for Milwaukee 8 when using 4.250″ Bore Cylinders * No head modification required ...
Regular price $1,185.99
Sale price $1,185.99
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Features & Benefits:- * Super Duty KB Forged Coated Anodized Piston Kit. * 114 or 117ci to Big bore 128″ piston kit for Milwaukee 8 when using 4.250″ Bore Cylinders * No head modification req...
Regular price $257.99
Sale price $257.99
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Cylinder Stud kit, 3/8-16 x 6.680″, 8 pack. Fits 1984-1999 V-Series engines with less than 4″ bore. * Replaces OEM # 16837-85 Suggested Additional Purchase: Head Bolt Kit # CM-2011-8, CM-2012-8 o...
Regular price $257.99
Sale price $257.99
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* Cylinder Stud kit, 3/8-16 x 6.070″, 8 pack. * Replaces OEM # 16834-99 Suggested Additional Purchase: Head Bolt Kit # CM-2012-8 or FE-3005
Regular price $1,065.99
Sale price $1,065.99
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Features & Benefits:- * ID # 6442 * Bore = 3.875″ * Stroke = 4.000″ * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * Forged from high strength 2618 alloy * Designed f...
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Regular price $1,065.99
Sale price $1,065.99
Regular price
Unit price
per 
Features & Benefits:- * Bore = 3.937″ * Stroke = 4.000″ * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * Forged from high strength 2618 alloy * Designed for maximum p...
Regular price $1,065.99
Sale price $1,065.99
Regular price
Unit price
per 
Features & Benefits:- * Bore = 3.937″ * Stroke = 4.000″ * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * Forged from high strength 2618 alloy * Designed for maximum p...